Buggy code:
public abstract class AbstractARGStrategy extends SequentialReadStrategy { private ARGState root ; protected final PropertyChecker propChecker ; private final ShutdownNotifier shutdownNotifier ; public AbstractARGStrategy ( Configuration pConfig , LogManager pLogger , PropertyChecker pPropertyChecker , ShutdownNotifier pShutdownNotifier ) throws InvalidConfigurationException { } @ Override public void constructInternalProofRepresentation ( UnmodifiableReachedSet pReached ) { } private boolean correctReachedSetFormatForProof ( UnmodifiableReachedSet pReached ) { } @ Override public boolean checkCertificate ( ReachedSet pReachedSet ) throws InterruptedException , CPAException { initChecking ( root ) ; logger . log ( Level . INFO , "Proof<seq2seq4repair_space>check<seq2seq4repair_space>algorithm<seq2seq4repair_space>started" ) ; ARGState initialState = ( ( ARGState ) ( pReachedSet . popFromWaitlist ( ) ) ) ; Precision initialPrecision = pReachedSet . getPrecision ( initialState ) ; logger . log ( Level . FINE , "Checking<seq2seq4repair_space>root<seq2seq4repair_space>state" ) ; if ( ! ( checkCovering ( initialState , root , initialPrecision ) ) ) { return false ; } pReachedSet . add ( root , initialPrecision ) ; do { if ( ! ( prepareNextWaitlistIteration ( pReachedSet ) ) ) { return false ; } while ( pReachedSet . hasWaitingState ( ) ) { shutdownNotifier . shutdownIfNecessary ( ) ; ( stats . countIterations ) ++ ; ARGState state = ( ( ARGState ) ( pReachedSet . popFromWaitlist ( ) ) ) ; logger . log ( Level . FINE , "Looking<seq2seq4repair_space>at<seq2seq4repair_space>state" , state ) ; <START_BUG> if ( checkForStatePropertyAndOtherStateActions ( state ) ) { <END_BUG> logger . log ( Level . INFO , "Property<seq2seq4repair_space>violation<seq2seq4repair_space>at<seq2seq4repair_space>state" , state ) ; return false ; } if ( state . isCovered ( ) ) { if ( ! ( checkCoveredStates ( state , pReachedSet , initialPrecision ) ) ) { return false ; } } else { if ( ! ( checkAndAddSuccessors ( state , pReachedSet , initialPrecision ) ) ) { return false ; } } } } while ( ! ( isCheckComplete ( ) ) ) ; return isCheckSuccessful ( ) ; } private boolean checkCoveredStates ( final ARGState pCovered , final ReachedSet pReachedSet , final Precision pPrecision ) throws InterruptedException , CPAException { } private boolean checkAndAddSuccessors ( final ARGState pPredecessor , final ReachedSet pReachedSet , final Precision pPrecision ) throws InterruptedException , CPAException { } @ Override protected Object getProofToWrite ( UnmodifiableReachedSet pReached ) { } @ Override protected void prepareForChecking ( Object pReadProof ) throws InvalidConfigurationException { } private boolean isCoveringCycleFree ( ARGState pState ) { } protected boolean checkForStatePropertyAndOtherStateActions ( ARGState pState ) { } protected abstract void initChecking ( ARGState pRoot ) { } protected abstract boolean prepareNextWaitlistIteration ( ReachedSet pReachedSet ) { } protected abstract boolean treatStateIfCoveredByUnkownState ( ARGState pCovered , ARGState pCoveringState , ReachedSet pReachedSet , Precision pPrecision ) { } protected abstract boolean checkCovering ( ARGState pCovered , ARGState pCovering , Precision pPrecision ) throws InterruptedException , CPAException { } protected abstract boolean checkSuccessors ( ARGState pPredecessor , Collection < ARGState > pSuccessors , Precision pPrecision ) throws InterruptedException , CPAException { } protected abstract boolean addSuccessors ( Collection < ARGState > pSuccessors , ReachedSet pReachedSet , Precision pPrecision ) { } protected abstract boolean isCheckSuccessful ( ) { } protected abstract boolean isCheckComplete ( ) { } }

Fix:
if ( ! ( checkForStatePropertyAndOtherStateActions ( state ) ) ) {